the preparation is a challenge, more than I had expected, because the shell is extremely thin. By the way, the preservation is excellent, but the details are small and you have to work with a fine needle on the airtool.

I hope that its not enrolled, I worked yesterday on the right side on the pleurae and they going first somewhat downwards but then the thorax seems to lay in a hollow back position.

The spines will be a really hard work, because they are so fine and fragile that they are normally not prepared. Hope I find a way to preserve them;-)

I finished this trilobite yesterday evening and I'm able to present some fresh pictures now. It's a small trilobite, only 1,8cm in length, so is was hard to prepare the small spines and I decided to let them in a small ammount of limestone, to give some more stability. One spine broken away during the preparation and so I let it be in the way you can see now.

Anyway, hope you like to see the small but rare and desired trilobite.

I am quite intrigued by seeing the structure of the cephalon in such detail.
This ridge on the border of the genal area and preglabellar field as well as the difference in patterns between the two separated area's somehow distantly remind of the brims on Harpetida. Quite an exciting trilobite.

I see also some similarities to cambrian trilobites, e.g. Olenus and relatives. Also very thin shelled and with this veiny delicate structures is another feature all this groups share together. Such veiny structures are called genal caeca and are interpreted as a respiratory system analogous to modern arthropods:

We find this structures normally in thin shelled trilobites, with different systematic relationships;-) So this structures are probably present (but not visible) in all trilobites and only the thin shelled trilobites present them us in the way we know;-)
If I have to guess, its sounds that the respiration system works trough the shell or its especially well developed as a adaption for probably environments with a poor content of oxygen. Hold in mind, that we have the theory of chemosymbiosis of Olenids together with bacterias.